Burglar-alarm



(-No Model.)

J. GILES. BURGL'AR ALARM.

110.252.095. Partented'Jan. 10,1882.

UNITED STATES JEROME GILES, OF SOUTH BEND, INDIANA.

Pn'rltivu- OFFICE;

BURG LAR-ALARM.

SPECIFICATION forming part of Letters Patent No.252,c95, dated January 10, 1882. Application filed Oetober fz-l, 1881. (No model.)

State of Indiana, have inventedcert-ain new and useful Improvements in Percussion Burglar-Alarms and I do herebydeclare the following to be afull, clear, and exact description of "theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification. v

Figure l is a perspective of myimproved percussion burglar-alarm. Fig. 2 represents the same applied to a window. Fig. 3 illustrates its application toa door-casing,and Fig. etshows a modified form of its application to a door.

Like letters of reference refer to like parts in all of the figures.

The object of my invention is to provide a simple, cheap means of protection to doors and windows, so that in case of an unauthorized opening of the same an alarm will be sounded; and myinvention relates to thatclass of alarms which may be termed detonatingor percussion alarms, and in which a spring-operated lever is released from confinement in a compressed or depressed condition at the moment that a door or window to which the device is attached is opened or partly opened, when the lever so released is immediately and forcibly brought against anipple, which, being supplied with an ordinary percussion cap, produces a report which gives warning of the opening of said door and window.

A represents the form of my device; and it consists of a U-shaped spring, A, of flat steel, and having one of the-legs of the U extended beyond the other, in which extension are two screw-holes, G, properly countersunk, and a nipple, B, so located that the. shorter leg of the spring projects over and beyondthe same, and when in its normal position the said shorter leg of the spring rests and bears upon said nipple. If desired, the longer leg may be provided with screw-holes between the nipple and the bend of the spring, as seen at d, Fig. 3, in which case holes may be provided in the shorter leg, through which the fastening-screwsmay be inserted and driven, and,if desired, two or more nipples may be provided with seats in, or, in other words, may be attached to, the longer or lower leg of the spring.

To use my device at and with a window'the longer legis secured to the sill F, Fig. 2, by the screws 0, and a screw or pin, D, is driven into the sashinsuchapositionthatitwilljustliftand depress the upper leg of the spring as it is raised and lowered. To set the alarm the upper leg is raised by the sash, orit may be by the hand, and a cap is placed upon the nipple and the leg lowered carefully until it rests on the pin D. It will readily be seen that if the sash be now raised the leg of the spring is also raised and will be released when under tension, and will strike and explode the cap, causing the alarm or report to be sounded.

In applying the device to a door it may be secured to the casing F by bending the extension of the lower leg at a right angle and securing it by the screws within the door-casing; 'or

this bent portion may be dispensed with and the screws 0 be placed back of the nipple, as above mentioned, and as clearly shown in Fig. 3. A screw in the edge of the door E, or the edge of the door itself, may perform the function of exploding the cap, as does the pin D.

In Fig. 4 I have illustrated a modified arrangement of the device, wherein I secure it to the ceiling and attach a latch, G, which holds the spring distended, and is connected to the I door E by a cord or wire passing through suitably-located screw-eyes, and attached to the latch G in such a manner that the opening of the door releases the spring from the latch and sounds the alarm.

My device is exceedingly simple and adapted lights, or scuttle-holes, blinds, and windowscreens, in which latter the wires of which they are composed, or an additional wire interlaced therein, may serve the function of pin D, so that when out to gain an admittance, as they usually are, said wires or wire will release the spring and produce the alarm.

I do not wish to be limited to the particular manners herein shown of applying my alarm, as it may be attached to the door or window or to the casin g of either, as it is evident that the spring and pin will co-operate when one is attached to the moving part and theother to the stationary part of anentrance, and by lengthening the cord attached to latch G a door or Window may be guarded when partly open, as for ventilation.

I am aware the U-shaped alarms have been used, and with a screw formed integral therewith and an operating-lever located between the nipple and bend of the spring, and do not claim such as of my invention; but,

Havingdescribed my invention and its operation, what Iclaini as new, and desire to secure by Letters Patent, is-

- As an article of manufacture, the flat steel 15 U-shaped spring A, the short leg of which, is provided with the nipple B and screw-holes c, and the long leg of which is provided with the aperture d, and arranged, when not under strain, to rest upon the nipple B,suhstantially 20 as shown and described.

In testimony whereof Ihave afiixed my signature in presence of witnesses.

JEROME GILES.

Witnesses:

LUcIUs HUBBARD, JNO. W. HARBAN, O. S. WITHERILL. 

